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As the optimizer uses more and more AST stuff, it's now time to create an "AST" module. Initially it defines following AST datastructures: * declarations: `Decl` + derived classes * `Conformance` * `SubstitutionMap` * `Type` and `CanonicalType` Some of those were already defined in the SIL module and are now moved to the AST module. This change also cleans up a few things: * proper definition of `NominalTypeDecl`-related APIs in `SIL.Type` * rename `ProtocolConformance` to `Conformance` * use `AST.Type`/`AST.CanonicalType` instead of `BridgedASTType` in SIL and the Optimizer
56 lines
1.9 KiB
Swift
56 lines
1.9 KiB
Swift
//===--- SubstitutionMap.swift --------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import Basic
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import ASTBridging
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/// SubstitutionMap describes the mapping of abstract types to replacement types,
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/// together with associated conformances to use for deriving nested types and conformances.
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///
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/// Substitution maps are primarily used when performing substitutions into any entity that
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/// can reference type parameters and conformances.
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public struct SubstitutionMap {
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public let bridged: BridgedSubstitutionMap
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public init(bridged: BridgedSubstitutionMap) {
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self.bridged = bridged
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}
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public init() {
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self.bridged = BridgedSubstitutionMap()
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}
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public var isEmpty: Bool { bridged.isEmpty() }
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public var hasAnySubstitutableParams: Bool { bridged.hasAnySubstitutableParams() }
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public var conformances: ConformanceArray { ConformanceArray(substitutionMap: self) }
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public struct ConformanceArray : BridgedRandomAccessCollection {
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fileprivate let bridgedSubs: BridgedSubstitutionMap
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public let count: Int
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init(substitutionMap: SubstitutionMap) {
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self.bridgedSubs = substitutionMap.bridged
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self.count = substitutionMap.bridged.getNumConformances()
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}
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public var startIndex: Int { return 0 }
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public var endIndex: Int { return count }
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public subscript(_ index: Int) -> Conformance {
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assert(index >= startIndex && index < endIndex)
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return Conformance(bridged: bridgedSubs.getConformance(index))
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}
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}
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}
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